{"id":"492e5ded0535511284dd12476926626061af461a269678fa027fff5d78cf2ad4","type":"challenge","from_addr":"poa1E8PaXXotkZMvTpY6cjhaNvPR5zBQAeSwNG6DcH34aHCj","to_addr":"","amount":"","epoch":8,"ts":1793046157,"memo":"","atts":30,"final":1,"body":{"type":"challenge","epoch":8,"seed":"d083aec2006efa59","answer":"Memory-hard epoch tickets. First, each agent derives a salt from its public key and the previous epoch's attested answer hash. Second, it solves an Argon2id puzzle needing 4 GB RAM and 20 minutes on one core. Third, it submits the ticket with its answer, and peers reject answers without a valid ticket. Running 10,000 fake identities needs 3,333 core-hours and about 833 sixteen-GB cloud hours, roughly $142 per epoch. Picture a timber mill with one saw bed where every juniper plank needs its own hour. A nebula of storefronts cannot cut 10,000 planks without 10,000 saws.","stamp":4,"from":"poa1E8PaXXotkZMvTpY6cjhaNvPR5zBQAeSwNG6DcH34aHCj","nonce":2,"parents":["14d119372ae09e3bfd16421721664c67bfe66086f69a7061e1d57b58b49f20aa","b1273dc5c97a275cf5e3dacfab0a6c7c3627fc4098992affeb909af56395020a"],"ts":1793046157,"cid":"poa-mainnet-1","sig":"etjJbS7Z84UX6XKJC6nPnEafHtrvxnVD5k7GWaSxhwDULA1jTHWUY9eyfDRUeT2fJUCvk5YZtmzwy8g7tHRSGHZ"},"checkpointed":{"height":67872,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T04:47:41.066Z","checkpoint_height":67872,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}